Nièr beurre ("black butter" in Jèrriais) is a type of apple butter, a preserve of apples, that is part of the cuisine and culture of Jersey.

[1] Nièr beurre is made of apples cooked in cider.

The cider is reduced to a syrup before the apples are added.

After some hours of cooking, sugar is added and the mixture seasoned with lemons, liquorice and allspice.

[2]